Kim Haechan, Kim Jungsoo, Kim Donghyun
Material & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), Ansan 15588, Korea.
Department of Material Chemical Engineering, Hanyang University, Ansan 15588, Korea.
Polymers (Basel). 2021 Aug 25;13(17):2859. doi: 10.3390/polym13172859.
Herein, core-superabsorbent polymer (CSAP) composites are prepared from oxidized starch (OS) via aqueous solution copolymerization using ammonium persulfate as the initiator, and 1,6-hexanediol diacrylate as the inner-crosslinker. The surface-crosslinking process is performed using various surface-crosslinkers, including bisphenol A diglycidyl ether (BADGE), poly(ethylene glycol) diglycidyl ether (PEGDGE), ethylene glycol diglycidyl ether (EGDGE), and diglycidyl ether (DGE). The structures of the CSAP composites and their surface-crosslinked SAPs (SSAPs) are characterized using Fourier transform infrared (FT-IR) spectroscopy, their absorption properties are measured via centrifuge retention capacity (CRC), absorbency under load (AUL), permeability, and re-swellability tests, and their gel strengths according to surface-crosslinker type and EGDGE content are examined via rheological analysis. The results indicate that an EGDGE content of 0.75 mol provides the optimum surface-crosslinking and SSAP performance, with a CRC of 34.8 g/g, an AUL of 27.2 g/g, and a permeability of 43 s. The surface-crosslinking of the CSAP composites using OS is shown to improve the gel strength, thus enabling the SAP to be used in disposable diapers.
在此，以氧化淀粉（OS）为原料，过硫酸铵为引发剂，1,6 - 己二醇二丙烯酸酯为内交联剂，通过水溶液共聚制备了核 - 高吸水性聚合物（CSAP）复合材料。使用包括双酚A二缩水甘油醚（BADGE）、聚乙二醇二缩水甘油醚（PEGDGE）、乙二醇二缩水甘油醚（EGDGE）和二缩水甘油醚（DGE）在内的各种表面交联剂进行表面交联过程。利用傅里叶变换红外（FT - IR）光谱对CSAP复合材料及其表面交联的高吸水性聚合物（SSAP）的结构进行表征，通过离心保留容量（CRC）、负载下吸水性（AUL）、渗透性和再膨胀性测试来测量其吸收性能，并通过流变分析研究根据表面交联剂类型和EGDGE含量的凝胶强度。结果表明，0.75 mol的EGDGE含量提供了最佳的表面交联和SSAP性能，CRC为34.8 g/g，AUL为27.2 g/g，渗透性为43 s。使用OS对CSAP复合材料进行表面交联可提高凝胶强度，从而使高吸水性聚合物可用于一次性尿布。
